Power mechanism



(No Model.) y 2 Sheets-Sheet 1.

G. COTTRELL.

POWER MEGHANISM.

Patented Feb. 21, 1888.

Ill' Il inland..

(No Model.) 2 Sheets-Sheet 2.

G. GOTTRELL.

POWER MBGHANISM. No. 378,192. Patented Feb. 21, 18884.v

@w1/Ummm; Y I l l m/4, L l we k UNITED STATES PATENT GEGRGE COTTRELL, OF SAN FRANCISCO, CALFGRNIA.

POWER MECHANISil/i.

SPECIFICATION forming part or Letters Patent No. 378,192, dated February 21, 1888.

Application lileri July 21, 185'?.

To @ZZ whom, it may concern.-

Be it known that l, GEORGE Co'rTnELL, of the city and county of San Francisco, State of California, have invented an Improvement in Power lllechanism; and l hereby declare the following to be a full, clear, and exact descrip tion of the same.

My invention relates to that class of power mechanisms employing differential gears, and in which an eccentric operates upon a swaying toothed disk which engages with a gear having a different number oi' teeth, whereby the power transmitted to said gear is a diii'erential one.

My invention consists in the constructions and combinations, which l shall hereinafter fully describe and claim.

The general object of my invention is to provide a differential power mechanism which is applicable to all machines which require the rotation of an inner part by means of power applied primarily to an outer part, such, for example, as capstans and presses.

The particular object is to provide a suitable power mechanism for a wine or cider press, which is adapted to vary its power to conform to the demands ofthe work.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure lis a perspective view of my mechanism. Fig. 2 is a horizontal section ofsameon line y y of Fig. 3. Fig. 3 is a vertical section on the line n; .r of Fig. 2. Fig. a is a plan oa modification. Fig. 5 is an elevation showing the application ol' my mechanism to a winepress.

A is the outer eccentric, consisting of a eircular piece or cap, the inner surface of the rim of which is eccentric to its center.

B is an inner part, which is here shown as a nut, and C is a pinionon said nut. The nut is mounted loosely in the center of the eccentric A, so that cach may have independent rotation.

D is the annular swaying disk, having its outer surface smooth and fitting within the eceentricA and its inner surface toothed and engaging the pinion C on the central nut, B. The disk l) and the pinion G have a diieren tial number of teeth. Now, it will readily be seen that if the disk D is so held that it can- Scrial No. 244,952. (No model.)

not rotate, but can only sway or move back and forth in transverse planes, the rotation of the eccentric A, acting through the swaying disk D, will transmit a differential rotation to the pinion C and nut B. The parts are here shown as fitted horizontally to an annui-arlygrooved bed,.E, and seated in the bed radially is a pin or bolt, F, having a stud,f, which engages with a radial groove or slot, d, in the lower face of the disk D, whereby said disk may move back and forth Aor sway, and yet cannot rotate; butwhen the pin is withdrawn outwardly far enough to disengage its stud from the disk the latter is relieved, and then, when locked to the eccentric-cap A, by means of a vertically-movable pin, G, passing down through semicircular seats in the adjacent surface of the two parts, both disk and cap rotate together and the motion transmitted to the central nut is simpleor direct.

As a means for applying the primary power to the eccentric-cap A, l here show a lever, H, having a head, I1, loosely fitted on the nut B, and provided with socketed ears It', through which gravitate pawls hwhich engage sockets Or holes a, arranged in annular series in the upper surface ofthe cap A.

I am aware that the principle of the mechanical movement l have described is not new of itself, for in chain-blocks and hoisting mechanisms differential gears can he found operated by an eccentric; but from the. nature of the application the eccentric is in the form of a central shaft operating through the swaying disk to transmit its power to an outside drum, and such a construction is not applicable to mechanism which requires the rotation of an inner part by power applied to the outside.

ltis obvious that the multiplication ot' power by. these means may be carried to as great an extent as is desirable. Thus iu Fig. it I show the use of asecoud eccentric, Land second swaying toothed disk J, the only change in this being that the second eccentric has to be provided with external teeth, i, in order to derive its rotation from the outer swaying disk, said eccentric and disk having, of course, a differential number of teeth. As l have heretofore said this mechanism though adapted for all machines where an internal part has to be rotated by power primarily applied to an ICO outer part-such, for example, as a capstanq is particularly applicable to a press for wine, cider, Src.; and to illustrate this portion of my invention I have in the first place shown the part B as a nut, and I shall now, by referring to Fig. 5, continue the description.

K is the basket of a wineepress, and L is a screw fixed rigidly in its center. This screw passes through and engages the nut B, and the bed E is secured firmly to or forms a part of the follower M, which plays in the basket. Now, when the operation is. beginning and power is less important than speed, I relieve the swaying disk D of the studfby withdrawing pin F, and I lock said disk to the eccentric A by the pin G. The movement of the lever H thereupon applies a simple or direct power tc the nut B, so that it runs down rapidly on thel screw and forces the follower down; but when the grapes offer greater resistance and more power has to be applied I unlock the eccentric by withdrawing pin G, and I lock the swaying disk by inserting pin F, so that the power of the lever is multiplied to accomplish the necessary movement of the follower. n

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-` 1. A power mechanism comprising an outer rotary eccentric, an inner rotary toothed part, and an intervening swaying toothed disk or gear acted upon by the outer eccentric and engaging the inner part, the teeth of said inner part and swaying disk or gear being differential in number, substantially as herein described.

2. A power mechanism comprising an outer rotary eccentric to which the power is primarily applied, an inner rotary part having external teeth, and aswaying annular disk in- -tervening between the outer eccentric and the inner part, said disk engaging the eccentric externally, and having internal teeth engaging the teeth of the inner part and differential in point of number, substantially as herein described.

3. A power mechanism comprising an outer rotary eccentric to which the power is priniarily applied, an inner rotary part having external teeth, an annular disk intervening between the outer eccentric and the inner part, said disk engaging the eccentric externally, and having internal teeth engaging the teeth of the inner part and differential in point of number, and al lock for the annular disk, whereby it is permitted to sway by the action of the eccentric, but is prevented from rotating, substantially as herein described.

4. A power mechanism comprising an outer ner part, said disk engaging the eccentric ex` ternally, and having internal teeth engaging the teeth of the inner part and differential in point of number, a sliding pin seated in the frame of the mechanism for locking the disk to prevent its rotating and for relieving 1t again, and a sliding pin for locking the eccentric and disk together, whereby they may rotate in unison, substantially as herein de scribed.

5. A power mechanism comprising an outer rotary eccentric, an inner rotating toothed part, a swaying annular gear engaging said rnner part, and having its teeth differential in point of number to the teeth of `said part, an eccentric operating externally on said swaying gear and having external teeth, and a swaying annular disk intervening between the outer eccentric and the inner eccentric, and having internal teeth engaging and differential in point of number to the teeth of said inner eccentric, substantially as herein described.

6. In combination with the basket, the follower, and the xed screw of a press, the mechanism for operating the follower, consisting of an externally-toothed nut traveling on thev number, an outer eccentric encircling and act! uating the swaying disk, a lever for rotating the eccentric, a sliding pin for locking and re- IOO lieving the swaying disk, and asliding pin for locking the eccentric and disk together and for relieving them, substantially as herein de scribed.

In witness whereof I have hereunto set my I hand.

GEORGE COTTRELL.

Witnesses:

S. H. NoURsn, H. C. LEE.

IIC 

